Gate for glass tanks



Sept. 7, 1926.. I 1598,7189

- J. E. SWEET GATE. FOR GLASS TANKS Filed Jan. 13, 1926 I 2 Sheets-Sheet 1 7 Sept. 7 1926.

J. E. SWEET GATE FOR GLASS TANKS 2 Sheets-Sheet 2 Filed Jan. 15, 1926 FIE-.3].

gate for shutting off Patented .Sept. 7, 1926.

JOHN E. SWEET, OF PITTSBURGH, PENN GLASS lJoltllAlbl'Y, A CORPORATION OF PENNSYLVANIA.

earn non GLASS-TANKS.

' Application filed January 1 3, H526. Serial No. 80,970.

The invention relates to a water cooled the flow of glass from ' a glass tank, such as is used for the continuous. formation of a rlbbon of invention has for provision of a ga permits the application of the heat to the portion of thetank at the same time that ack ofthc gate, and

which from the tank forward ofthe gate it is applied at the-b without withdrawing the its principal gate fr te of the type speci glass. The

object the fied,

om its position in the glass, thus permitting of a more gradual application of the heat slot member forward of thegate.

gradual application of injury is reduced. One embo tion is illustrated in the accompa Yings, wherein Figure glass t to. l of the larly relates, Fig; 2 being a front elevation,

Fig. 3

Referring to the drawings, ward end of a gl And Fig-s heat,

to the clay With such the danger. of

to the slot member due-to cracking his a vertical v ank with the invention ap diment of the invennying drawse'c'tion through a plied there 2, 3 and i are detail views gate to which the invention particua plan view, and Fig. line IV-IV of Fig: 2.

4' asection is the for ass melting tank containing a body of molten glass 2 and having at its end the remov the outlet slot fl. F

a pair of rolls 5, 5 for able wall 3 provided with orward of the slot i i are forming the continuous ribbon of glass 6, which passes sheets.

Lying to the gates 7 and .8, the ga its uppermost lowermost position.

through a leer and is then out into separate the rear ofthe outletslot 4; are te 7 being shown in position, and the gate 8 in its The gate 7 is of re-- fractory material supported from above by me ans may of ob of glass to the outlet slot 4.

gate 8 to which the invention particularly relates is also supported from above The means whereby the gate ains 9 connected to a era ref dinarily used, but in case dent to the gate 8 it to out oh the flow of chains 10 connected to a crane may be raised and lowered and moved laterally from its position above glass upwar onsists of a bottom be immersed in the 2 extending three parts together constituting a U when viewed in front elevat on (Fig. 2). This main portion sYLvANm; ASSIGNOB, "ro-rrr'rsn unsn rLA'rn of the gate is built up of boiler plate stayed f' at proper intervals by the bolts 13 which;

boiler plate suitably stayed by bolts 16, and

is guided (in its vertical movement by means of the members 17. and 18, the members 17 being welded the main portion of the gate, while the mem bers 18 are welded to the gate member ll and fit beneath the edges of the members 17. The main portion of the gate is water cooled by means of an inlet pipe 19 through to the side members 12, '12 of which water is supplied and by means pf outlet pipes 20, such pipes being connected to flexible hose so as not to interfere with the raising and lowering of the gate. Similarly, the gate member 14: iscooled by means of a'circulation of pipe 22 and the outlet pipe 23, such pipes also being connected to flexible hose-for supplying and carrying away thevwater. case sediment collects in the gate members, this may pipes 24: and 25 having the horizontal'por tions 26 and 27 provided with outlet'perfo ration-s along their lower sides.

' In operation when it becomes necessary to removethe wall member 3, due to wear orcorrosion around the slot 4, the gate is lowered into the glass, as indicated in Fig. 1, so that the glass in contact therewith is chilled and hardened. Therolls 5, 5 and the wall 3 are then removed andthe glass 28"forvvard of the gate is broken away and removed. The new wall 3 is then put in position and also the rolls 5. The method of heating up the new wall preliminary to raising the gate burners through fines or openings 29 on opposite sides of the tank, but with this method it has been found verydiflicult, and practically impossible to get the'front wall at a proper temperature to receive the glass when the gate was raise'd, and as a result, the front wall, and particularly the portion surroundbe loosened by means of the air has heretofore been toheat with water through the'inlet in'g the'slot 4 was more or less injured due to cracking and spalling incident to the sudden: application of heat and incident to the: flow. of the glass and theraising of the gate. With the; present operation involving the =two part gate, themain portion of the gate is left in its lower position,-'so that the hotheat from the tank through the opening and {to the front of the gate, including the wall 3 tom end o'f the gate blocks any flow of glasswhen the small gate member v14L is raised.

In starting the operation with the new appa-ratus, the gate member 14 is first raised either in part or in whole, thus admitting into the space between the gate and the wall By leaving this'smal-l gate up, a proper period oftime, the portion of the furnace and the-clay surrounding the ontlet l, are broughtto a u'niform temperature of such high degree that when the glass is admitted 'to the'front of the gate and the rolling operation started,.thereisnoinjury to the clay work,- When the areathefront' of the gate jis p operly heated throu h the opening providedbyithelifting oft e small gate,

the maingateiis lifted in 'the usual way, perinitting th 'glass to flow gradually into: th

. spaceatfthe frontof the gate, thus placing the apparatus againon an operating basis. .VVhat'I' claimisa- If v 1-. The combination with a meltingtank' having an outlet opening atits forward end,

ofiawater cooled metal gate member to the rearof such outlet opening having air-opening therethrough and mounted for vertical movement, and a, movable Water cooled section closing said opening and mounted for vertical movement in said gate member.

having an outlet opening at its forward end, ofa water cooled metal gate member of U 2. The combination with a. melting tank I form-mounted for vertical movement, and a.

movable water cooledsection fitting in' said gate member and mounted for vertical movement therein. 7 f

3. The combinationv with a melting. tank having an outlet opening at its forward end,

rof a water cooled metal gate member to-the rear 'of such outlet opemng having an;openingtherethrough and mounted for vertical movement, and a movable watencooled sec tionclosing said opening and mounted for vertical novement insaidgate member, theopening through said gate member lying gate memberjand mounted for vertical movement therein, the bottom portionof said gate member bein'g'arranged to lie with its upper 'edge above the level of the. glass whensaid gatemember is in its lowered or. operative position. i v V In testimony whereof, I have hereunto subscribed my name this 5th day of J anu- JOHN E. SWEET. 

